Optimized quasisymmetric stellarators are consistent with the Garren–Boozer construction

Landreman, Matt

doi:10.1088/1361-6587/ab19f6

Title: Optimized quasisymmetric stellarators are consistent with the Garren–Boozer construction

Journal Article · 23 May 2019 · Plasma Physics and Controlled Fusion

DOI: https://doi.org/10.1088/1361-6587/ab19f6 · OSTI ID:1597702

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Univ. of Maryland, College Park, MD (United States)

The majority of quasisymmetric stellarators to date have been designed by numerically optimizing the plasma boundary shape to minimize symmetry-breaking Fourier modes of the magnetic field strength B. At high aspect ratio, a faster approach is to directly construct the plasma shape from the equations of quasisymmetry near the magnetic axis derived by Garren and Boozer [Phys Fluids B 3, 2805 (1991)]. Here we demonstrate that the core shape and rotational transform of many optimization-based configurations can be accurately described by this direct-construction approach. This consistency supports use of the near-axis construction as an accurate analytical model for modern stellarator configurations.

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Research Organization:: Univ. of Maryland, College Park, MD (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES); Simons Foundation

Grant/Contract Number:: FG02-93ER54197

OSTI ID:: 1597702

Journal Information:: Plasma Physics and Controlled Fusion, Vol. 61, Issue 7; ISSN 0741-3335

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 11 works

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References (27)

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Cited By (4)

Near-axis expansion of stellarator equilibrium at arbitrary order in the distance to the axis Jorge, R.; Sengupta, W.; Landreman, M. Journal of Plasma Physics, Vol. 86, Issue 1 https://doi.org/10.1017/s0022377820000033	journal	January 2020
Constructing stellarators with quasisymmetry to high order Landreman, Matt; Sengupta, Wrick arXiv https://doi.org/10.48550/arxiv.1908.10253	text	January 2019
Near-Axis Expansion of Stellarator Equilibrium at Arbitrary Order in the Distance to the Axis Jorge, R.; Sengupta, W.; Landreman, M. arXiv https://doi.org/10.48550/arxiv.1911.02659	text	January 2019
Ion-temperature-gradient stability near the magnetic axis of quasisymmetric stellarators Jorge, R.; Landreman, M. arXiv https://doi.org/10.48550/arxiv.2102.12390	text	January 2021

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